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US 5,963,234 AGranted
Laminated ink jet recording head having flow path unit with recess that confronts but does not communicate with common ink chamber
AssigneeSeiko Epson Corporation
InventorsYoshio Miyazawa, Minoru Usui, Fujio Akahane, Takahiro Katakura, Motonori Okumura, Tomoaki Abe
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Abstract
A recess is formed in a surface confronting an actuator unit of an ink supply inlet forming substrate. When a flow path unit and the actuator unit are bonded together using a fusible film, thermally expanded air is released into the recess to thereby reduce pressure. Further, by arranging the recess at a position confronting a pressure generating chamber, an air layer formed by the recess is allowed to function as a vibration shielding member.
Claims14
A laminated ink jet recording head comprising:
- an actuator unit hating a pressure generating chamber and means for generating pressure in said chamber;
- and
- a flow path unit having a surface to which said actuator is laminated, said flow path unit having a common ink chamber formed therein,
- wherein said flow path unit further comprises a recess that is formed in said surface and confronts said common ink chamber and said pressure generating chamber, said recess being disposed between said common ink chamber and said pressure generating chamber without being in fluid communication with said common ink chamber and said pressure generating chamber.
1 more element
A laminated ink jet recording head comprising:
- an actuator unit having a pressure generating chamber and means for generating pressure in said chamber;
- and
- a flow path unit having a surface to which said actuator unit is laminated, said flow path unit having a common ink chamber formed therein,
- wherein said flow path unit further comprises:
- an ink supply inlet forming substrate having a recess that confronts said common ink chamber;
- a common ink chamber forming substrate laminated on said ink supply inlet forming substrate and having said common ink chamber formed therein;
- and
- a nozzle plate laminated on said common ink chamber forming substrate and having a nozzle opening,
- wherein said ink supply inlet forming substrate comprises:
- a first metal thin plate, a first adhesive layer, a plastic film, a second adhesive layer and a second metal thin plate in that order, wherein said recess is formed by partially removing one of said first metal thin plate and said second metal thin plate with said plastic film as an etching stopper.
7 more elements
Dependencies are inferred from the claim text.